Tube-socket meter



W. E. BEEDE TUBE SOCKET METER Filed Feb. 10. 1928 lNVEN 146/ [er Egan eATTORNEY Patented .0... so, 1928.

QUNETED (STATES PATENT OFFICE.

Wliflrnitn; BEEDE}, or 'PENACOOK, NEW HAMPSHIRE.

I TUBE-SOCKET METER.

Application filed February 10, 1928. Serial No. 253 817.

The device consists of an electrical 1neasur-- ing meter, preferably avoltmeter, attachedto a socket base provided with a pair of filamentpegs, a grid peg, a plate peg and a side bayonet slot peg. The filamentpegs are electrically connected to operate the voltmeter, While the gridpeg and plate peg together with the filament pegs are engageable againstthe grid, plate and filament pegs respectively,

of a radio tube socket to properly support the device. Means fortiltably connecting the voltmeter to the socket case may be provided forconvenience in reading the device.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following de- 2scription and accompanying drawings, and

1 to the appended claims in which the various novel features of theinvention are more particularly set forth.

Referring to the accompanying drawing, forming a material part of thisdisclosure Fig. 1 is a side view of a device constructed according tothis invention.

Fig. 2 is a central vertical sectional view thereof.

Fig. 3 is a plan view thereof. v I

Fig. 4 is a plan View of the bottom of the device. a

Fig. 5 is a side view of a. device of modified form. I,

Fig. 6 is a rear end View thereof.

Fig. 7 is a schematic wiring diagram of the device. J

The reference numeral 10 indicates generally the casing of avoltmeterhaving a dial face 11, a glass dial cover 12, an indicatinghand 13, hand actuating means 14 connected to hand 13, and binding posts15 and 16 electrically connected to operate means 14. Thus brieflystated, an ordinary voltmeter has been described.

A socket base 17 of cup construction, and of insulation material, hasthree lugs 18 attached to its top end by eyelets 19. The socket base isattached to the casing 10 by binding posts 15 and 16'engaging the freeends of two of the lugs 18, and a bolt and nut 20 securing the thirdlug18 to the casing 10. The bottom of the casing 10' is formed with airapertures 21. I

A pair of filament plugs 22 and 23, a grid plug 24:, and a plate plug 25are attached to the bottom of the socket base 17 Thefilament' plugs 22and 23 are electrically 0on 'nected with thebinding posts 15 and 16. A

resistance coil 26 is housed within the socket base 17 and thus held byscrew-27. A bayonet slot] plug 28 projects from the side of thesaidsocket base member.

In Figs. 5 and 6 the voltmeter is shown as being pivotally-connected atone side to the socket member 17, as at 29. Diametrically oppositeconnection 29, a. pair of lugs, 30 project from the casing 10. Anarcuate member 31 is pivoted at its top end between the lugs 30 and hasa projecting finger 32 connected to one'end of a tension spring 33having its other end connected to the casing 10. The spring .33 normallyacts to urge the arcuate member 31 towards the socket base 17, and asecond arcuate member 34 is attached to the socket base to form anabutment for the first arcuate member 31. The adjacent sides of thearcuate members are serrated and thus frictional- 1y hold relativepositions,

so as to adjustably hold the voltmeter in tilted positions. Thevoltmeter has a pair of contacts 35 connected to operate the means 14:,and a pair of springs 36 act against the contacts 35 and connect'withthe filament plugs 22 and 23.

In operation the device is inserted into a radio tube socket, indicatedby dot dash lines 37 The bayonet plug 28 engages in the bayonet slot ofthe socket, and the filament plugs, the plate plug, and the grid plugengage the respective springs within the said socket. The voltmeter thenindicates whether the radio tubes of the radio set may safely be placedinto the set, and also the condition of the A battery of the set.

While I have shown and described a preferred embodiment of my invention,it is to be understod that I do not limit myself to the preciseconstruction herein disclosed and the right is reserved to all changesand modifications coming within the scope of the invention as defined inthe appended claims.

Having thus described my invention what I claim as new and desire tosecure by United States Letters Patent is 1. A radio tube socket meter,comprisinga socket base arranged for engaging in a radio tube socket, anelectrical meter pivotally attached on the top thereof at one side, andarranged forv tilting into positions at angles to the socket base, and ameans for holding the various" tilted positions.

tached on the topthereot at one side, and arranged for tilting intopositions at angles to the socket base, an arcuate serrated memberpivotally attached on'the meter, a SQOQnd arcuate serrated memberattached on tho 1 socket base, and means for urging the pivotedserrated' mernber against the other one for trictionally holding setposltions.

3. A, radio tube socket meter, comprising a socket base a-rranged'forengaging in a radio tube socket, an electricalmeter pivotally at-'tached on the top thereof atone side, and ar% ranged for tilting intopositions at angles to the socket base, an arcuate serrated memberpivotally attached, on the-meter, a second arcuate serrated memberattached on the socket base, and a spring forvurging the piv-' otedserrated member against the other one for frictionally holdingsetpositions.

4. A radio tube socket meter, comprising a socket base arrangedforengaging in a radio tube socket, an electrical meter p l'votallyattached on the top thereof at one side,'and arranged for tiltingintopositions at angles to the socket base, a serrated member pi'votallyattached on the meter, a second serrated memberattached on the socketbase, and means tor urging the pivoted serrated" member against theother one for frictionally holding r set positions. a v

In testlmony whereof I have afiixed my signature WALTER E. BEEDE.

